闰年检查

Posted 2021-02-24

Extend Date object to have isLeapYear() boolean (true for Leap Years)
Taken from https://raw.github.com/vitch/jquery-methods/master/date.js

Date.prototype.isLeapYear = function() {
	var y = this.getFullYear();
	return (y%4==0 && y%100!=0) || y%400==0;
};